I want to seperate areas which are stored in a labeled array. My intention was to use contourf as the built-in interpolation prevents sharp edges. As seen in the following picture, this is what I do not wan't to achieve (just as an example, contourf is not doing that!):
When I use
[M, c] = contourf(image_array, 200)
then 200 areas are succesfully distinguished. I know before how many areas there will be. However the above code results in a strange behaviour as lines are not only surrounding the labeled area, but instead other areas as well. The next picture is illustratin what I'm talking about:
As seen at most boundaries more than one line is seperating the areas.
My two questions are:
- How can I prevent contourf from using multiple lines around an area? What I want is just a single line as in the top right or bottom middle part of the picture.
- Any ideas how I can export the resulting seperation lines to mesh the areas e. g. with gmsh?
I attatched a file showing a cropped part of my areas.